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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fdeeb5c3deb6a3e18b6a7418506bfb59408b05419e318b7736e2780ebce7a35a' 
  AND token = '0I9EQbPAmW3QBuhJ8ll0Q/4K4DgY+To+bnGyWi6tV1A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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