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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '01131148fd61f5f18625c1fc77e5d767da25faca63bad61b09830007acc59ba4' 
  AND token = '2cA73kkmlLL4SKcQqelLilfwBzi5n1GTop/hDTA1R9Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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