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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd44a30bf169828507592accd0dec34fdf3ab39a70f7dab5aed714d2f21cf6d1' 
  AND token = 'oDb2Wme/byYhbNbodAz0SBe+N6zzn/72WhYqyuMid/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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