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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '9e6b082b26ed8c166ef602d887c343240de211b3f7c16fc6f4aa13e1bc0c4d5b' 
  AND token = 'cJRXVh+tC2fpZkGLt1PgtosPT6SnVKVeFO2JYui272k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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