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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '5da3387a87568fee28a4ccba22dd6f86c040098c8858b6824cf822e95a34e28c' 
  AND token = 'H7oxiDPaML+A/3LUGTCKI5cLQER0Nn/L/t6XJpqH6v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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