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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '2a3b1def9ea3a0af3aa10697b13b599ce3f9022e1c4a67cb47324fa842418b48' 
  AND token = 'R9Wyfa++XlQOT/hnWTC9lAUptyRJ5cbNoNb6CtQHdzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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