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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee70d3194a4a31e9eb744d41299a3de8180ff53f4a5b8a45351ec697830bbbf2' 
  AND token = 'oXo4q5Tw9fWIxECWEj+9YWpiyglyyvbT0BUaBUg2k0g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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