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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ce9f5c0205f3a03da659476fcb1f8dc173fadcb34fdb39824e2734c43bac67eb' 
  AND token = 'kIdIvjKwcNwcUKLyr3qz0GerjeIoVucl/myj86NSSe0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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