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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3213b4fbd58fe767efa0a792a95a054c7fb441a00ff8d26944035d9e620c2eb1' 
  AND token = 'RKZ3ThSI231LJG4VEySOOvh4m2YJvncsbdMjElUHF2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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