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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae2418a1d898071bdb99a1d6d2c22440faf186f6e62bcdec340d65c5aba7ce14' 
  AND token = 'gHP5aec4UIFuFfZrEKvO7z6+2wvJADOGXcZFY/G7e/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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