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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2dc402add9d8931ea6319d2b9ce0d7979dc870d1d0aef5d20ad1c074a6d0df8' 
  AND token = 'i10UVP5wbFYDCrRO0rG0ybQAe1ZbKB4ggxsbr/+Ct24=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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