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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f9a0f5f667b499bdb708eec2854e1cab313d157fa39e52b83277a50b9f278436' 
  AND token = 'kMObY7noTVBpSb/1W14k4y4FkxgwkBtAFVNnKIHOHQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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