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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fb8753443e86725a291e73e0445aedb47936ca1b30cd5377b5ef068ecc71d22' 
  AND token = 'gygyly7DPIessv+25mxO/Qy1cyC1J1JEnFVAJHZrS/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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