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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'babaf0fb59d741778f6a4e7464e6b9ef4aaa85d2d7714bc485834ee92c5ec757' 
  AND token = '34jSTN0wg4itg2Gup175pD1c5D37q0u/E+kNS/Ro7Hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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