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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dd2603cc99c8b04472bf0bcd0f3a27b04a6cdaa71ec878c9b75a7d24468ecb8' 
  AND token = 't3GvVoDvsrzvElerPf3GJs2vjrHHf6TRFY3WBFNOZ4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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