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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e9411b49f2482b18f119b47b9b1ab8482bb5b3d94523ee5c420d0778b4850a76' 
  AND token = 'ziU5N5LvYP5K2RhOIWeGXgTn1r6NcTAUk1rbISkRHYY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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