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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '132586bdb04dc1d8c54a028717396475bf27d03280f2450d4f4d8f8021582e7d' 
  AND token = 'Bbg1aq4wdHkyBCoopm0BFo2JnNOMktv5mJcQ3kcHWlc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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