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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07217ea89bf053996dcb57da1922f57c684ac70a1d5bf5778000a22ad469db5e' 
  AND token = 'q3O+j2HwfxPefFmm40XQw6dJ/oXaQ+8AGqU+P55v8aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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