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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b4e30ea3eaf522e611a036b28a8814f64d189fc4357ccbb9b7a6a780ed8eacc' 
  AND token = '07jLHaDFI56IZwoayFDq7FXrPiHek8qoQ3MISLS0rWM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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