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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'eba5310c43f76d0be94f520425bc7d6ffe87ab3b7f66842900b3e3d2453d578e' 
  AND token = '8oXvt1DZ3sCToD9a1E7lScNfkdROahUB8bRJ390fGaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00355

JSON explain

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