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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1ca614aa74dab6b70d0af0b44de9c31f6ff044b0b049a1978f02cda9e7082041' 
  AND token = 'Jb9oSaTvru3tZ3aNZyBmMotRO7LMfdaxW3Xc3Nc9SC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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