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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7489ad13eac9c3ec1d9074317d1c8cf641d71065e75d94d99925f08a36019bf1' 
  AND token = 'bPPv8Soy9mdjjSAvXyJPPfrZnVe901VoJydmNr1lwGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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