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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07b0e5d54859af41fe55f00046773e8a1efaf00fd4e61068d7f0c13a27ceb059' 
  AND token = 'HhePZpDUFpussBgXiJirTjqO8yw3HVy63fVnhTPCHQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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