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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '9226924ed167ae94469e06f51bb4db62c0d27b2d0d6de002098ebb43f3260f82' 
  AND token = '/QKvcqsaYF/spwHSr/5UYdYYj4T4OM8grwF1Ks7AOiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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