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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5e980a367b1131f9e4f33310b477a64db0aeea291a1db772aad72b1b18750059' 
  AND token = 's7jrwm+aW95ejKd6Mk6bHq3zCF8Z4o0oS67Yy/x3Wo0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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