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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '060bc03e118116828420e52e9b8b1957a6af06b94d2628c112e5c0735a4445bc' 
  AND token = 'UfdK8MdSy9qUyKw6Rmm7asrnPc8FFrk9vrkkXHq3Myc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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