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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93e581364d47817eb7bd3d2b0b016ba4ac5589f365097bb2a9999fb3d908f803' 
  AND token = 'uiR26H2a/vO3qT3SSp9eOlIWyczYO25pZFfqGs0c1aw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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