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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bd94d5a493dfae3b4a5075e2edd45b62606e25bd9e59cf3c37414c147cef8ab6' 
  AND token = 'x90/t7l6USOHXfpJjZr2nE86RXYaqljKpOI4ex3XiG8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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