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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '202d380bb5106047febee765ab7918c2e55bc500ff47d88ed278b2a64047392f' 
  AND token = 'wUIHRPyDhO/Cynr3aPtnZ3L028XCR3jkiTDvcdQgDWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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