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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bc95c44620cf1886307d788ab7e423f8501c932aad5c4884ec5153b7d20548f' 
  AND token = 'rh/ydgl/5U+wUJI+XIuflIXNaJuwJbg8i+Jfa5pejUs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}