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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e8554aebc11c1a04e1ea1474e9e6f4b2e98b63e341b1607ca3b97db986920678' 
  AND token = 'zyVgySdo/Vldm1wsDOo0AmJ7NJxbPLP02s9vI7UYMIY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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